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參數(shù)資料
| 型號： | AAT3120ITP-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 3-Channel Charge Pump For White LED Applications |
| 中文描述： | 3通道電荷泵白光LED應(yīng)用 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 268K |
| 代理商： | AAT3120ITP-T1 |
AAT3120
3-Channel Charge Pump
For White LED Applications
3120.2005.11.1.1
1
ChargePump
General Description
The AAT3120 is a low noise, constant frequency
charge pump DC/DC converter that uses fractional
(1.5X) conversion to improve efficiency for white
LED applications. The device can be used to pro-
duce eight current levels up to 20mA per channel
for up to three channels. 1X load switch mode is
also built-in to improve efficiency at low current set-
tings. Low external parts count (two 1μF flying
capacitors and two small 1μF capacitors at V
IN
and
OUT) makes the AAT3120 ideally suited for small
battery-powered applications.
AnalogicTech's S
2
Cwire (Simple Serial Control)
serial digital input is used to enable, disable, and
set current for each LED at eight different levels.
The AAT3120 has a thermal management system
to protect the device in the event of a short-circuit
condition at the output pin. Built-in soft-start circuit-
ry prevents excessive inrush current during start-
up. A high charge pump switching frequency
enables the use of very small external capacitors.
A low current shutdown feature disconnects the
load from V
IN
and reduces quiescent current to less
than 1μA. The AAT3120 is available in the very
small Pb-free 12-pin TSOPJW package.
Features
V
IN
Range: 2.7V to 5.5V
Fractional Charge Pump Mode
Drives Low-V
F
and High-V
F
Type LEDs
Up to Three LED Outputs
— Single Wire Programming
— Eight Regulated Current Settings
— Max 20mA per Channel
Low Noise Constant Frequency Operation
No Inductors
1MHz Switching Frequency
Small Application Circuit
Automatic Soft-Start
I
Q
<1μA in Shutdown
12-Pin TSOPJW Package
Applications
Color (RGB) Lighting
Programmable Current Source
White LED Backlighting
White Photo Flash for DSCs
Typical Application
C
IN
1
μ
F
V
BATTERY
C
OUT
1
μ
F
EN/SET
C1
1
μ
F
C2
1
μ
F
D3
VIN
VOUT
C1+
C1-
C2+
C2-
D1
D2
D3
EN/SET
GND
AAT3120
D2
D1
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PDF描述 |
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| AAT3123A | High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
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| AAT3129 | High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3122 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
| AAT3122_05 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
| AAT3122ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:1.5X, 1X WH LED CHPMP, TSOPJW-12 TR |
| AAT3123 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
| AAT3123_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
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